Question about Toshiba 50H82 50" Rear Projection Television

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No picture or sound

I have a Toshiba model 50H82. I just lost the picture AND the sound. It was working fine, I turned it off one night, when I wanted to turn it back on the next night, there was no picture OR sound. The red LDE comes on and that is all. I live 90 miles our in the sticks and would like to be able to fix this myself as a service call just to pick up the tv is 250 $ ! I have a great background in electronics and have been a ham radio operator for 40 years. I think i could fix it IF I knew what to replace. THANK YOU for your time and help with my problem Ernie If you have the answer you may e-mail me direct at

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Re: no picture or sound

This symptons is usually caused by a breakdown in the power supply. it may also be caused by a breakdown in the horizontal deflection circuits(hor. oscillator, pre drive or drive ckts.). this because the supplu voltages from tuner, video intermediate frequency (vif), video amplifier, sound intermediate frequency(sif), and vertical output are usually supplied by horizontal output circuit. switch on the receiver and check whether the pilot lamp is on, or the filament of the crt is glowing. if not, possible short circuit before the rectifier circuit such as fuse, power cord or switch. if the pilot lamp is on or the filament of the crt is glowing, check the b+ supply voltage for the horizontal deflection circuit. if the b+ voltage is zero or very low, check the rectifier circuit and the voltage regulator circuits. if b+ is nrmal, troubleshoot the horizontal deflection circuits.

Posted on Jan 16, 2007

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